Friction-brake.



PATENTED JUNE 27, 1905.

vwamtoz Howard C. Marmon.

V vllI|IIIllllllIIIIllllllllllllllllllll! H. G'. MARMON.

PRIGTION BRAKE.

APPLICATION FILED JUNE 4, 1904.

No. l793,206.

Patented June 27, 1905.

PATENT @Finca HOIVARD C. UARMON, OF INDIANAPOLIS, INDIANA.

FRlCTlON-BRAKE..

SEECIFICATION forming part of Letters Patent No. 793,206, dated June2'7, 1905.

AppIination tiled .Tune 4, 1904. SeriaI No. 211,112.

To m/f/ I/'lf/mt if V11mg/ concern:

Be it known that I, IIowAnD C. Mannion, a citizen of the United States,residing' at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and uselful Improvemei'its inI*`riction-Brakes,of wh ich the following is a specification.

'Ihe object of my invention is to provide a vfriction-brake constructionof internal or external ring type in which the braking pressure may beuniformly applied throughout the entire circumference.

The accompanying drawings illustrate my invention.

Figure I is a section on line I I of Fig. 2 of an internal brakeconstructed in accordance with my invention; Fig. 2, a section on line 2of Fig. I, and Fig. 3 is an enlarged detail section on line I I of Fig.2.

In the drawings, I0 indicates the rear-axle structure, within which issuitably 'iournaled the driving-axle II. the bearings having beenomitted for convenience in illustration. Secured tothe outer end of axleII is the wheeliub IQ, which carries the brake-cup I3. Se- `ured to orVformed integral with the axle structure IO are two oppositely-arrangedarms II and I5. Secured to the arm I4; is a pin I6, provided at itsouter end with a rectangular head 1T, which projects into cup I3. HeadIT tits in a radial slot I8, Vformed in a lug I9, carried by the splitbrake-ring Q0, which lies within the cup I3. Slot IS in its radiallength is considerably greater than the radial dimensions of head I7.Passing through the inner cross-bar of the lug I9 is an adjusting-screwQI, which is threaded into head IT. Arranged between the cross-bar oflug IS) and head IT, surroumlingtheadjusting-screw il, is a spring L2 ofa strength suilicient to support the weight of the brake-ring. It willbe noticed, of course, that this the arrangement of the spring when thepin It is on the lower side of the axle structure; but if `for anyreason it would be desirable to reverse the position of parts shown inFig. I the spring 22 would then be placed between the head IT and themain body of the brake-ring'. Arranged between the adjacent ends of thebrake-ring 2O is the usual spreading-cam Q3, carried by a shaft QI,journalcd in the arm I5. Shaft ZI carries a suitable operating-lever Q5,by means of which the cam may be operated.

In the operation of the brake the action of the spreading-cam throws thetips of the two arms of the brake-ring into engagementwith thebrake-cup, and in the ordinary types of brakes of this kind all of thewear takes place at this point` In the present device, however, as soonas the tips of the arms of the brake-ring come into engagement with thebrake-cup the whole ring is shifted radially in the cup, compressingspring 22 until all parts of the brake-ring come into contact with thebrake-cup uniformly. By this construction there is therefore a uniformwear of the brake-ring at all times; but there is n0 frictional contactbetween the cup and ring except when the arms of the ring are separated.

It will be understood that a similar construction may be applied to anexternal braking-ring without departing from my invention.

I claim as my invention-- l. A brake consisting of an annular brakemember, a coacting split-ring member, a pinand-slot connection betweensaid ring member and a stationary support substantially opposite thesplit, the slot being' substantially radially te, and the pin being'substantially parallel with, the axis of the annular member, the saidsupport, a spring acting radially on said split-ring member inopposition tothe weight, and means `for adjusting the splitring memberrelatire to the annular brake member.

Q. A brake consisting of an annular brake member, a coacting split-ringmember having' a radial slot formed therein substantially opposite thesplit, a stationary pin arranged substantially parallel with the axisand project `ingl into said slot, an :uljustingscrew arranged betweenthe pin and the split-ring member, and a supporting-springalso arrangedbetween the split-ring' member and said pin.

In witness whereof l have hereunto set my hand and seal, atIndianapolis, Indiana, this 20th day of May, A. I). 190A.

IIOWARI) (I. MAIUIIMN.

Witnesses:

Au'ruuu M. IIoop, Janus A. IVALsu'.

lr.. s. l

It is hereby certified that Letters Patent No. 793,206, granted J une27, 1905, upon the application of Howard C. Marnion, of Indianapolis,Indiana, for au improvement l in Friction-Brakes,77 was erroneouslyissued to said Howard C. Marmon as owner of said invention; Whereas thesaid Letters Patent should have been issued to Nordyke it MormonCompany, of Indianapolis, Incl., a corporation of Indiana, as owner ofthe entire interest in said invention, as shown by the assignments ofrecord in this the same may conform to the record of the ease in thePatent Ofioe.

in Letters Patent Na 793,206a

il oiee; and that said Letters Patent should be read with thiscorrection therein that l l x Signed and sealed this 18th day of July,A. D., 1905. l, [SEAL] F. I. ALLEN,

Commissioner of Patents..

Correction

